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Serum or plasma concentration of vitamin A (retinol)

Published: August 9, 2026Updated: August 16, 2026

This test measures the amount of vitamin A in your blood, an important nutrient for vision, immune function, and skin health.

Quick summary

["Vitamin A helps protect your eyes and supports your body’s defenses."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
95700-1
Short code
MVEV IgA Spec Ql IA
Synonyms
MVEV IgA Spec Ql IA
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ia
CPT
82784
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why Might You Need This Test?

Your healthcare provider may order this test if you have symptoms like night blindness, frequent infections, dry skin, or if you’re at risk for vitamin A deficiency (e.g., due to poor diet, liver disease, or malabsorption issues). It can also help monitor vitamin A levels during treatment for certain conditions.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for 8–12 hours before the draw if your lab uses a specific method. Bring your lab results and any medications you’re taking to your appointment.

What Happens During the Test?

A healthcare professional will draw blood from a vein in your arm. The blood sample will be sent to a lab to measure vitamin A levels using an immunoassay or similar method.

What Are the Results Meaning?

Results may be compared to a reference range provided by your lab, but exact values can vary by lab. Low levels may indicate deficiency, while high levels could signal liver disease or other conditions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Low vitamin A levels can weaken your immune system, impair vision, and increase infection risk. High levels may suggest liver problems or overconsumption of supplements. Always discuss results with your doctor.

Short name

Vitamin A Level

Frequently asked questions

What causes vitamin A deficiency?
Vitamin A deficiency often results from poor diet (low intake of liver, fish, or fortified foods), malabsorption disorders (like celiac disease or cystic fibrosis), liver disease, or certain medications that interfere with absorption.
How long does it take to get results?
Results are typically available within 1–3 business days, depending on your lab’s processing time. Your doctor will contact you once they’re ready.
Can I take vitamin A supplements if my levels are low?
Only follow your doctor’s advice about supplements. Too much vitamin A can be harmful, so they’ll guide you on safe intake or dietary changes.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy